How to distinguish the performance of chip capacitors

When evaluating the chip capacitor function, which aspect should I take? How to distinguish the performance of the chip capacitor? Xiaobian follows the detailed analysis:




When evaluating the chip capacitor function, which aspect should I take? How to distinguish the performance of the chip capacitor? Xiaobian follows the detailed analysis:

Patch capacitance identification is mainly carried out in three aspects:

First, the chip life of the patch capacitor function, under the conditions of 125deg.c ambient temperature and 2.5Ur DC load, the chip should not break down for 100 hours, and the quality can withstand 1000 hours without breakdown.

Second, the chip capacitor has four conventional electrical functions, namely capacity Cap. loss DF, insulation resistance IR and withstand voltage DBV. Generally, the loss value of X7R commodity is DF500 Euro* method, BDV>2.5Ur.

The third is the thermal shock resistance of the chip capacitor. The capacitor is immersed in a 300deg.c tin furnace for 10 seconds. It can be placed in a few comparisons, and then taken out under the microscope to see if there is any crack on the surface, and then the capacity can be tested. Loss and comparison with the thermal shock before the chip is not an internal crack.

Sometimes the chip capacitor suddenly has a problem in the circuit. It may be due to the poor quality of the chip capacitor. It may also be due to the poor selection of the design or the external thermal stress on the surface. The formation of certain damage and other factors is formed. Http://news.chinawj.com.cn Editor: (Hardware Business Network Information Center) http://news.chinawj.com.cn

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